package fifth;

public class TV {
    int channel =1;
    int volumeLevel =1;
    boolean on = false;

    public TV(){

    }
    public void turnOn(){
        on = true;
    }
    public void turnOff(){
        on = false;
    }

    public void setChannel(int newChannel) {
        if(on && newChannel >=1 && newChannel <= 120)
            channel = newChannel;
    }
    public void setVolume(int newVolumeLevel){
        if (on && newVolumeLevel>=1 && newVolumeLevel<=7){
            volumeLevel = newVolumeLevel;
        }
    }
    public void channelUp(){
        if(on && channel<120){
            channel++;
        }
    }
    public void channelDown(){
        if(on && channel>1){
            channel--;
        }
    }
    public void volumeUp(){
        if(on && volumeLevel <7){
            volumeLevel++;
        }
    }
    public void volumeDown(){
        if(on && volumeLevel >1){
            volumeLevel--;
        }
    }





}
